After replacing my focus ring (yes the typical thing that breaks), I have noticed that the lens can only find focus about 50% of the time in good lighting. I can manually focus just fine and the autofocus appears to have no issue moving the glass, it just cannot lock on focus. And we are not talking about a little bit out of focus or the wrong element is focused, I mean the entire image is out of focus.

No other lenses are having this issue. Issue is present on my T2i and 5DMII.